Lyla Lindsey
The Australian funnel-web spider is a venomous mygalomorph spider native to eastern Australia, usually found within a 100 km radius of Sydney. It is a member of a group of spiders known as Australian funnel-web spiders, which includes the Sydney funnel-web spider and the Blue Mountains funnel-web spider. The Sydney funnel-web spider is the most notorious spider in the world and has a fearsome reputation. It is known to have killed at least 13 people, but there have been no fatalities since the introduction of antivenom in 1981. The diet of the Sydney funnel-web spider consists of beetles, cockroaches, insect larvae, native land snails, millipedes, and occasionally frogs and other small vertebrates.
| Characteristics | Values |
|---|---|
| Diet | Beetles, cockroaches, insect larvae, native land snails, millipedes, small lizards, small skinks, frogs, and other small vertebrates |
| Body length | 1 to 5 cm |
| Colour | Blue-black, black, brown, or dark-plum |
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What You'll Learn
The Australian funnel-web spider's diet includes beetles
The Australian funnel-web spider is a species of venomous mygalomorph spider native to eastern Australia, usually found within a 100 km radius of Sydney. It is a member of a group of spiders known as Australian funnel-web spiders, which includes the Sydney funnel-web spider and the Blue Mountains funnel-web spider. The diet of the Sydney funnel-web spider includes beetles, as well as other insects and small vertebrates.
The Sydney funnel-web spider (Atrax robustus) is the most well-known member of the Australian funnel-web spiders. It is found within a 160-km radius of Sydney and is known for its aggressive behaviour and highly toxic venom. The spider is glossy and dark-coloured, ranging from blue-black to black, brown, or dark plum. The male spider has a large mating spur projecting from the middle of its second pair of legs.
The diet of the Sydney funnel-web spider consists primarily of insects, including beetles, cockroaches, insect larvae, and millipedes. They also eat small vertebrates, such as native land snails, small lizards, frogs, and small skinks. The spiders typically hunt at night, waiting inside their burrows for potential prey to walk across silken trip-lines placed around the entrance. They then rush out to grab their meal and return to their burrow to eat.
The inclusion of beetles in the diet of the Sydney funnel-web spider highlights the adaptability and opportunistic nature of these spiders. Beetles are a diverse group of insects with various species and sizes, providing a good source of protein and other nutrients for the spiders. By including beetles in their diet, the Sydney funnel-web spiders can ensure a more consistent food source, as beetles can be found in a variety of habitats and climates.
The diet of the Australian funnel-web spider, including the Sydney funnel-web spider, showcases their ecological role in regulating insect populations. Their diet primarily consists of insects, with beetles being a significant component. This helps maintain a balance in the ecosystem by controlling the numbers of these invertebrate species. Additionally, their role as predators contributes to the natural selection process, as only the fittest and most adaptable insects may evade or survive encounters with these venomous spiders.
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Cockroaches are also on the menu
The funnel-web spider is a patient predator. When hungry, it waits inside the entrance of its burrow, ready to rush out when potential prey walks across the silken trip-lines that it has placed around the outside of its lair. These trip-lines are an early warning system, allowing the spider to sense the vibrations of approaching prey. The spider then races out to grab its meal, subduing it with an injection of venom from its large fangs.
Cockroaches, along with beetles, small lizards, millipedes, insect larvae, native land snails, and occasionally frogs and other small vertebrates, are all part of the diet of the funnel-web spider. These spiders are not picky eaters and will take advantage of whatever prey comes their way. They typically hunt at night and are most active during the summer and autumn months when males leave their burrows in search of mates.
The funnel-web spider's ability to sense vibrations through its trip-lines makes it a highly effective predator of cockroaches. Cockroaches, being nocturnal insects, are likely to be active during the same periods that the spiders are hunting. The cockroaches' tendency to hide in moist, shaded areas, such as rockeries, dense shrubs, and leaf litter, also overlaps with the funnel-web spider's preferred habitat. This increases the likelihood of encounters between these two species.
The funnel-web spider's powerful venom and aggressive nature make it a formidable predator of cockroaches. While cockroaches may possess some defensive mechanisms, such as their speed and ability to hide in small spaces, they are no match for the spider's venomous fangs and agile hunting strategy.
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They eat small lizards and skinks
Australian funnel-web spiders are one of the most medically significant groups of spiders in the world and are regarded by some to be the most deadly, in terms of both clinical cases and venom toxicity. They are mostly found in the eastern states of Australia, particularly in the upland forest areas of Sydney's Hornsby and Woronora Plateaus, where their preferred sheltered and humid habitats are abundant.
Sydney funnel-web spiders are known to eat small lizards and skinks. They typically hunt at night, waiting inside their burrow entrances for prey to walk across the silken trip-lines they have placed around the outside. When prey is sensed, the spider rushes out to grab it and take it back to the burrow to eat.
Funnel-web spiders are known to be aggressive and will attack. They have large fangs that can easily penetrate a human fingernail and ample venom glands that lie entirely within their chelicerae. The venom has a neurotoxin component that attacks the human nervous system and can be fatal if not treated immediately.
Funnel-web spiders are easily identifiable by their dark brown to black colouring, finger-like spinnerets at the end of their abdomen, and shiny, solidly built limbs. They build funnel-shaped webs, which they use as burrows or to trap prey.
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Millipedes are a common food source
Sydney funnel-web spiders live in silk-lined burrows in sheltered sites under logs and rocks, where they can maintain a cool and humid climate. When hungry, they wait inside their burrow, ready to rush out and capture prey that walks across the silken trip-lines they have placed around the entrance. Millipedes are one of the spider's primary food sources, along with beetles, cockroaches, small lizards, and even small vertebrates like frogs.
The diet of the Sydney funnel-web spider reflects its habitat and hunting strategy. Millipedes are abundant in the moist forest regions and upland areas where these spiders make their burrows. The trip-lines they use to detect prey are an effective way to secure a steady food supply, including millipedes, which are slow-moving and easily ensnared.
Millipedes provide a nutritious meal for Sydney funnel-web spiders, offering a source of protein and other essential nutrients. They are also a suitable size for the spiders to handle, and their hard exoskeleton provides a protective barrier that the spider's powerful fangs can easily penetrate.
The consumption of millipedes by Sydney funnel-web spiders is an important aspect of their ecology and survival strategy. The availability of this food source helps regulate the spider population and contributes to their overall health and longevity.
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Occasionally, they eat small vertebrates like frogs
The Sydney funnel-web spider (Atrax robustus) is a species of venomous mygalomorph spider native to eastern Australia, usually found within a 100 km (62 mi) radius of Sydney. It is a member of a group of spiders known as Australian funnel-web spiders. Its bite is capable of causing serious illness or death in humans if left untreated.
Sydney funnel-web spiders are aggressive and solitary animals, except when mating. They tend to live in lush gullies beneath rocks and fallen timber, as well as in moist soil beneath houses, crevices in garden rockeries, and compost heaps. Their diet typically consists of insects such as beetles, cockroaches, insect larvae, and millipedes.
However, occasionally, they will eat small vertebrates like frogs. This is not their primary source of food, but it demonstrates their adaptability and willingness to explore different prey items. These spiders are opportunistic feeders and will take advantage of available food sources in their environment.
The inclusion of small vertebrates in their diet highlights the hunting capabilities of Sydney funnel-web spiders. They are known to be patient hunters, waiting inside their burrow entrances for potential prey to walk across silken trip-lines. Their powerful venom also plays a crucial role in subduing larger prey, such as frogs, by injecting a dose of neurotoxin that can paralyze their victims.
The consumption of small vertebrates like frogs by Sydney funnel-web spiders is an intriguing aspect of their behaviour and further emphasizes the importance of understanding their ecological role and impact on their surroundings.
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Frequently asked questions
The Australian funnel-web spider typically eats beetles, cockroaches, small lizards, skinks, insect larvae, native land snails, millipedes, and occasionally frogs and other small vertebrates.
The Australian funnel-web spider waits inside its burrow for potential prey to walk across silken trip-lines placed around the outside of its burrow. It then senses the vibrations and rushes out to grab its meal.
Australian funnel-web spiders live in silk-lined burrows in sheltered, cool, and humid sites under logs, rocks, and fallen timber. They can also be found in moist soil beneath houses, crevices in garden rockeries, and compost heaps.
They are shiny, dark brown to black spiders with finger-like spinnerets at the end of their abdomen. Males have a large mating spur projecting from the middle of their second pair of legs.
Males grow up to 25mm long, while females can reach 35mm in length.
